US7273209B2 - Suspension apparatus - Google Patents

Suspension apparatus Download PDF

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Publication number
US7273209B2
US7273209B2 US11/204,105 US20410505A US7273209B2 US 7273209 B2 US7273209 B2 US 7273209B2 US 20410505 A US20410505 A US 20410505A US 7273209 B2 US7273209 B2 US 7273209B2
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Prior art keywords
liquid
hydraulic
pressure
passage
accumulator
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Expired - Fee Related, expires
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US11/204,105
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US20060054439A1 (en
Inventor
Motohiko Honma
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Toyota Motor Corp
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Toyota Motor Corp
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Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA reassignment TOYOTA JIDOSHA KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HONMA, MOTOHIKO
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/0416—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions
    • B60G17/0432—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions by varying the number of accumulators connected to the hydraulic cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/154—Fluid spring with an accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/50—Pressure
    • B60G2400/51—Pressure in suspension unit
    • B60G2400/512—Pressure in suspension unit in spring
    • B60G2400/5122—Fluid spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/20—Spring action or springs
    • B60G2500/206—Variable pressure accumulators for hydropneumatic suspensions
    • B60G2500/2064—Variable pressure accumulators for hydropneumatic suspensions by varying the number of accumulators connected in parallel to the hydraulic cylinder

Definitions

  • the present invention relates to a suspension apparatus including a hydraulic suspension device (e.g., a so-called “hydraulic suspension cylinder”) and at least two accumulators which are connected to the suspension device.
  • a hydraulic suspension device e.g., a so-called “hydraulic suspension cylinder”
  • at least two accumulators which are connected to the suspension device.
  • Patent Document 1 Japanese Patent Application Publication No. 63-130419
  • Patent Document 2 Japanese Patent Application Publication No. 63-78806
  • Patent Document 3 Japanese Patent Application Publication No. 63-49512 discloses a suspension apparatus including a hydraulic suspension cylinder provided for a wheel of a vehicle, two accumulators connected to the suspension cylinder, and a switchable valve provided between the two accumulators.
  • the switchable valve When, in the above suspension apparatus, the switchable valve is switched between a closed state thereof and an open state thereof, the number of the accumulator(s) that communicates or communicate with the suspension cylinder is changed, and accordingly a spring constant of the two accumulators as a whole is changed between a high value and a low value.
  • the claimable modes include at least respective modes corresponding to the appended claims, but may additionally include broader or narrower modes of the present invention or even one or more different inventions than the present invention.
  • Each of the following modes (1) through (10) is numbered like the appended claims, and depends from the other mode or modes, where appropriate, so as to help understand the claimable modes and to indicate and clarify possible combinations of elements or technical features thereof. It is, however, to be understood that the present invention is not limited to the elements or technical features of the following modes, or the combinations thereof, that will be described below for illustrative purposes only.
  • a suspension apparatus for use in a vehicle including a body, a body-side member, a wheel, and a wheel-side member, the apparatus comprising a hydraulic suspension device which is adapted to be provided between the body-side member and the wheel-side member; a first accumulator which is connected to the hydraulic suspension device via a liquid passage and which allows a hydraulic liquid to flow from the liquid passage into the first accumulator when a pressure of the hydraulic liquid in the liquid passage exceeds a first pre-set liquid pressure, the liquid passage including a first portion which is located between an intermediate point thereof and the hydraulic suspension device, and a second portion which is located between the intermediate point thereof and the first accumulator; and a second accumulator which is connected, via a connection passage shorter than the second portion of the liquid passage, to the intermediate point of the liquid passage and which allows the hydraulic liquid to flow from the liquid passage into the second accumulator when the pressure of the hydraulic liquid in the liquid passage exceeds a second pre-set liquid pressure higher than the first pre-set liquid pressure.
  • the hydraulic suspension device
  • At least two hydraulic accumulators including the first and second accumulators are connected, in parallel, to the hydraulic suspension device.
  • the hydraulic liquid in the liquid passage exceeds the first pre-set liquid pressure
  • the hydraulic liquid flows into the first accumulator; and when the hydraulic pressure exceeds the second pre-set liquid pressure higher than the first pre-set liquid pressure, the hydraulic liquid flows into the second accumulator.
  • the second pre-set liquid pressure be higher than the first pre-set liquid pressure by an appropriate amount.
  • the second liquid pressure may be pre-set at such a value that may be regarded as being excessively high for the present suspension apparatus, or such a value that may prevent the hydraulic pressure from being excessively increased.
  • the second accumulator functions as a relief device.
  • the present suspension apparatus may employ, e.g., two or three hydraulic accumulators that are connected, in parallel, to the hydraulic suspension device. In the case where the suspension apparatus employs three hydraulic accumulators, the present invention is applicable to two hydraulic accumulators out of the three hydraulic accumulators.
  • the hydraulic liquid passage (hereinafter, referred to as the “system pressure” where appropriate) is higher than the first pre-set liquid pressure and lower than the second pre-set liquid pressure, the hydraulic liquid flows between the hydraulic suspension device and the first accumulator, upon operation of the suspension device.
  • the hydraulic liquid is inhibited from flowing into, and out of, the second accumulator. If the hydraulic liquid from the first accumulator flows toward the suspension device, at the intermediate point of the liquid passage where the connection passage is connected to the liquid passage, cavitation would occur to the connection passage and, because of changes of the hydraulic pressure at the intermediate point, pulsation would occur to the connection passage. The pulsation may produce abnormal noise or adversely influence the operation of the suspension device.
  • the first accumulator is connected to the suspension device via the liquid passage including the first portion located between the intermediate point thereof and the suspension device and the second portion located between the intermediate point and the first accumulator, and the second accumulator is connected, via the connection passage shorter than the second portion of the liquid passage, to the intermediate point of the liquid passage.
  • the first accumulator is connected to the suspension device via the first and second portions of the liquid passage
  • the second accumulator is connected to the suspension device via the connection portion and the first portion of the liquid passage.
  • the first portion of the liquid passage is common to the first and second accumulators, the second portion of the liquid passage is exclusive to the first accumulator (hereinafter, referred to as the “first individual passage” where appropriate), and the connection passage is exclusive to the second accumulator (hereinafter, referred to as the “second individual passage” where appropriate). Since the second individual passage is shorter than the first individual passage according to the mode (1), pulsation can be more effectively prevented from occurring to the second individual passage, as compared with a case where the second individual passage is longer than the first individual passage. Thus, the production of abnormal noise can be restrained, and the adverse influence to the suspension device can be reduced.
  • the second individual passage may be shorter than the first individual passage such that a ratio, L 2 /L 1 , of a length, L 2 , of the second individual passage to a length, L 1 , of the first individual passage is not more than 1 ⁇ 2, not more than 1 ⁇ 3, not more than 1 ⁇ 5, or not more than 1/7 and, more preferably, not more than 1/10, not more than 1/20, not more than 1/30, or not more than 1/50.
  • each of the first and second accumulators accommodates an elastic body whose elastic deformation allows the hydraulic liquid to flow into said each of the first and second accumulators, and wherein the first accumulator has, as a first initial liquid pressure thereof, a lowest permission liquid pressure that permits the hydraulic liquid to flow thereinto, and the second accumulator has, as a second initial liquid pressure thereof, a lowest permission liquid pressure that permits the hydraulic liquid to flow thereinto and is higher than the first initial liquid pressure.
  • the elastic body may be provided by a mass of pressurized gas, such as a mass of high-pressure air; or a spring.
  • the first initial liquid pressure may be equal to the first pre-set liquid pressure.
  • the second initial liquid pressure may be equal to, or lower than, the second pre-set liquid pressure.
  • each of the first and second accumulators includes a housing; and a partition member which separates an inner space of the housing into two portions one of which provides a hydraulic chamber filled with the hydraulic liquid and an other of which accommodates an elastic body elastically pressing, via the partition member, the hydraulic liquid filling the hydraulic chamber.
  • the partition member may be provided by a flexible member such as bellows, a diaphragm, or a bladder; or a piston.
  • the elastic body may be provide by a spring.
  • the above-indicated first or second initial liquid pressure of the first or second accumulator can be increased or decreased by increasing or decreasing pressure of the gas charged into the accumulator; and in the case where the elastic body is provided by a spring, the first or second initial liquid pressure of the first or second accumulator can be increased or decreased by increasing or decreasing a pre-set load of the spring.
  • the switchable valve may be a solenoid-operated valve or a relief valve as will be described below.
  • the switchable valve comprises a solenoid-operated valve which is switchable from a closed state thereof to an open state thereof when the pressure of the hydraulic liquid in the liquid passage exceeds the second pre-set liquid pressure.
  • the switchable valve comprises a relief valve which is switchable from a closed state thereof to an open state thereof when a pressure difference obtained by subtracting, from the pressure of the hydraulic liquid in the liquid passage, the pressure of the hydraulic liquid in the connection passage exceeds a reference pressure.
  • the reference pressure may be a biasing pressure produced by a spring associated with the relief valve.
  • the solenoid-operated valve or the relief valve is provided between the second accumulator and the liquid passage, i.e., in the connection passage (i.e., the second individual passage).
  • the hydraulic liquid In the closed state of the solenoid-operated valve or the relief valve, the hydraulic liquid is inhibited from flowing into the second accumulator; and in the open state of the solenoid-operated valve or the relief valve, the hydraulic liquid is allowed to flow into the second accumulator.
  • the second initial liquid pressure (i.e., the lowest permission liquid pressure) of the second accumulator may take any value so long as it is not higher than the second pre-set liquid pressure.
  • the second initial liquid pressure may be equal to, or lower than, the first initial liquid pressure of the first accumulator.
  • connection passage may be not more than 10 mm, not more than 20 mm, not more than 50 mm, not more than 100 mm, or not more than 200 mm.
  • each of the first and second accumulators includes a housing; and a partition member which separates an inner space of the housing into two chambers one of which is located on a side of a corresponding one of the liquid passage and the connection passage and provides a hydraulic chamber filled with the hydraulic liquid and an other of which is located opposite to the hydraulic chamber and provides a spring chamber elastically pressing, via the partition member, the hydraulic liquid filling the hydraulic chamber.
  • each of the first and second accumulators functions as a pressure-change absorbing device.
  • a suspension apparatus for use in a vehicle including a body, a body-side member, a wheel, and a wheel-side member, the apparatus comprising a hydraulic suspension device which is adapted to be provided between the body-side member and the wheel-side member; and at least two accumulators comprising a first accumulator and a second accumulator which are connected, in parallel, to the hydraulic suspension device via a first liquid passage and a second liquid passage, respectively, which have different lengths.
  • the suspension apparatus in accordance with the mode (9) may employ any of the technical features in accordance with the modes (1) through (8).
  • a suspension apparatus for use in a vehicle including a body, a body-side member, a wheel, and a wheel-side member, the apparatus comprising a hydraulic suspension device which is adapted to be provided between the body-side member and the wheel-side member; a first accumulator which is connected to the hydraulic suspension device via a liquid passage and which allows a hydraulic liquid to flow from the liquid passage into the first accumulator when a pressure of the hydraulic liquid in the liquid passage exceeds a first pre-set liquid pressure; and a second accumulator which is connected to an intermediate point of the liquid passage and which allows the hydraulic liquid to flow from the liquid passage into the second accumulator when the pressure of the hydraulic liquid in the liquid passage exceeds a second pre-set liquid pressure higher than the first pre-set liquid pressure.
  • the suspension apparatus in accordance with the mode (10) may employ any of the technical features in accordance with the modes (1) through (9).
  • the second accumulator may be provided at a position nearer to the hydraulic suspension device than a position where the first accumulator is provided, according to the mode (1).
  • FIG. 1 is a schematic view of a relevant portion of a suspension apparatus as a first embodiment of the present invention
  • FIG. 2 is a graph representing a relationship between stroke of a shock absorber of the suspension apparatus and system pressure of the apparatus;
  • FIG. 3 is a schematic view corresponding to FIG. 1 , showing a relevant portion of another suspension apparatus as a second embodiment of the present invention.
  • FIG. 4 is a schematic view corresponding to FIG. 1 , showing a relevant portion of another suspension apparatus as a third embodiment of the present invention.
  • suspension apparatus as an embodiment of the present invention by reference to the drawings.
  • four suspension apparatuses each according to the present invention are provided for four wheels (i.e., left and right front wheels and left and right rear wheels) of a vehicle, respectively, one of the four suspension apparatuses that is provided for, e.g., the left front wheel will be described as a representative of the four apparatuses, and description of the other, three apparatuses is omitted.
  • reference numeral 10 designates a shock absorber as a sort of so-called “hydraulic suspension cylinder”, i.e., a sort of hydraulic suspension device.
  • the shock absorber 10 is provided, for a left front wheel 12 of an automotive vehicle, between a wheel-side member 14 located on the side of the wheel 12 , and a body-side member 16 located on the side of a body of the vehicle.
  • the shock absorber 10 includes a cylindrical housing 20 , a piston 22 that is slideably received in an inner space of the housing 20 , and a piston rod 24 that is fixed, at one end thereof, to the piston 24 .
  • the housing 20 is fixed to the wheel-side member 14 such that the housing 20 is not movable relative to the same 14 in an upward or a downward direction; and the piston rod 24 is fixed, at the other end thereof, to the body-side member 16 such that the piston rod 24 is not movable relative to the same 16 in the upward or downward direction.
  • the inner space of the housing 20 is separated by the piston 22 into two hydraulic chambers 30 , 32 , and the piston 22 has a communication passage 34 which has a restrictor and through which the two hydraulic chambers 30 , 32 communicate with each other.
  • the housing 20 and the piston 22 are moved relative to each other in the same direction.
  • the shock absorber 10 exhibits a damping effect corresponding to a speed of movement of the piston 22 relative to the housing 20 .
  • a damping-characteristic control actuator not shown, changes a cross-section area of the communication passage 34 , and thereby controls a damping characteristic of the shock absorber 10 .
  • One 32 of the two hydraulic chambers 30 , 32 of the shock absorber 10 is connected, in parallel, to a first and a second accumulator 42 , 44 via a flow passage 40 .
  • Each of the first and second accumulators 42 , 44 includes a housing 48 , and a partition member 50 that separates an inner space of the housing 48 into two chambers, i.e., a hydraulic chamber 52 located on the side of the flow passage 40 , and a gas chamber 54 located opposite to the hydraulic chamber 52 .
  • the hydraulic chamber 52 is filled with a hydraulic liquid
  • the gas chamber 54 accommodates a mass of pressurized gas (e.g., high-pressure air) functioning as an elastic body.
  • a pressure of the liquid in the hydraulic chamber 52 and a pressure of the gas in the gas chamber 54 are kept equal to each other.
  • the initial liquid pressure of the first accumulator 42 is equal to a first pre-set liquid pressure; and the initial liquid pressure of the second accumulator 44 is equal to a second pre-set liquid pressure higher than the first pre-set liquid pressure.
  • each of the two accumulators 42 , 44 is of a bladder type wherein the partition member 50 is provided by a bladder.
  • the flow passage 40 includes a common passage 60 , and a first and a second individual passage 62 , 64 that are connected to the first and second accumulators 42 , 44 , respectively.
  • the shock absorber 10 and the first accumulator 42 are connected to each other by the common passage 60 and the first individual passage 62 ; and the shock absorber 10 and the second accumulator 44 are connected to each other by the common passage 60 and the second individual passage 64 .
  • the common passage 60 and the first individual passage 62 cooperate with each other to provide a liquid passage, and provide a first portion and a second portion of the liquid passage, respectively.
  • a connection point 66 where the second individual passage 64 is connected to the common passage 60 provides an intermediate point of the liquid passage; and the second individual passage 64 provides a connection passage connected to the intermediate point of the liquid passage.
  • the second individual passage 64 is shorter than the first individual passage 62 , and accordingly the second accumulator 44 is nearer to the shock absorber 10 than the first accumulator 42 .
  • a length L 2 of the second individual passage 64 is not more than 100 mm, and a ratio L 2 /L 1 of the length L 2 of the second individual passage 64 to a length L 1 of the first individual passage 62 is equal to one twentieth ( 1/20).
  • the liquid pressure in the hydraulic chamber 32 of the shock absorber 10 is changed, and the piston 22 is moved relative to the housing 20 in the upward or downward direction, so that the shock absorber 10 gives or receives some amount of the hydraulic liquid to or from the first accumulator 42 .
  • the initial liquid pressure of the second accumulator 44 is higher than that of the first accumulator 42 , and normal changes of the liquid pressure in the hydraulic chamber 32 of the shock absorber 10 do not exceed the second pre-set liquid pressure as the initial liquid pressure of the second accumulator 44 .
  • the shock absorber 10 and the first accumulator 42 communicate some amount of the hydraulic liquid with each other.
  • the present suspension apparatus can prevent the system liquid pressure from being excessively increased over a permitted liquid pressure. That is, even if the shock absorber 10 may be operated by its full stroke, the system liquid pressure of the present suspension apparatus does not exceed the permitted liquid pressure. Thus, the present suspension apparatus can prevent an excessively great force from being applied to, e.g. a piping system thereof defining the flow passage 40 and thereby enjoy an improved durability.
  • the second liquid pressure corresponding to the second accumulator 44 is pre-set based on the permitted liquid pressure of the suspension apparatus.
  • the present suspension system can take a low spring constant state in which the system liquid pressure is higher than the second pre-set liquid pressure, and a high spring constant state in which the system liquid pressure is lower than the second pre-set liquid pressure and the hydraulic liquid is inhibited from flowing into, or out of, the second accumulator 44 .
  • the high spring constant state of the suspension apparatus if the hydraulic liquid from the first accumulator 42 flows, at the connection point (i.e.
  • the second individual passage 64 is shorter than the first individual passage 62 . Therefore, pulsation can be effectively prevented from occurring to the second individual passage 64 , abnormal noise resulting from the pulsation can be reduced, and the influence of the noise to the shock absorber 10 can be reduced.
  • the second liquid pressure corresponding to the second accumulator 44 is pre-set based on the permitted liquid pressure of the suspension apparatus.
  • the second liquid pressure of the second accumulator 44 may be pre-set in different manners, so long as the second pre-set liquid pressure is higher than the first pre-set liquid pressure corresponding to the first accumulator 42 .
  • FIG. 3 shows a second embodiment of the present invention.
  • the second embodiment differs from the above-described first embodiment shown in FIG. 1 , in that the second embodiment additionally employs a relief valve 100 that is provided in the second individual passage 64 connected to the second accumulator 44 .
  • the relief valve 100 is switched from a closed state thereof in which the relief valve 100 does not allow the hydraulic liquid to flow into the second accumulator 44 , and to an open state thereof in which the relief valve 100 allows the hydraulic liquid to flow into the second accumulator 44 , when the system liquid pressure, i.e., the liquid pressure of the flow passage 40 exceeds the second pre-set liquid pressure corresponding to the second accumulator 44 .
  • the second embodiment can enjoy the same advantages as those of the first embodiment.
  • the initial liquid pressure of the second accumulator 44 is lower than the second pre-set liquid pressure and, when a pressure difference obtained by subtracting, from the liquid pressure in the flow passage 40 , the liquid pressure in the connection passage 64 exceeds a pressure applied by a spring to the relief valve 100 , the relief valve 100 is opened to allow the hydraulic liquid to flow into the second accumulator 44 .
  • the second pre-set liquid pressure is equal to the initial liquid pressure of the second accumulator 44 plus the biasing pressure applied by the spring to the relief valve 100 .
  • FIG. 4 shows a third embodiment of the present invention.
  • the third embodiment differs from the above-described second embodiment shown in FIG. 2 , in that the third embodiment employs, in place of the relief valve 100 , a solenoid-operated open/close valve 102 , and additionally employs a pressure sensor 110 that is provided in the flow passage 40 to detect the system liquid pressure, and a suspension ECU (electronic control unit) 112 that is essentially constituted by a computer and is connected to the solenoid of the open/close valve 102 and the pressure sensor 110 .
  • a suspension ECU electronic control unit
  • the suspension ECU 112 supplies an electric current to the solenoid of the open/close valve 102 , so as to switch the valve 102 from a closed state thereof to an open state thereof. Consequently the hydraulic liquid is allowed to flow into the second accumulator 44 as well.
  • the third embodiment can enjoy the same advantages as those of the first and second embodiments, e.g., can prevent the system liquid pressure from being excessively increased.
  • the relief valve 100 or the solenoid-operated open/close valve 102 it is not essentially required to pre-set the initial liquid pressure of the second accumulator 44 to be higher than that of the first accumulator 42 . That is, the initial liquid pressure of the second accumulator 44 may be equal to, or lower than, that of the first accumulator 42 .
  • each of the first and second accumulators 42 , 44 is not limited to the above-described bladder type.
  • each accumulator 42 , 44 may be of a bellows type, a diaphragm type, or a piston type.
  • the two accumulators 42 , 44 may be of different types from each other.
  • each of the two accumulators 42 , 44 may have an arbitrary spring constant.
  • the shock absorber 10 functions as the hydraulic suspension device.
  • an elastic-force producing device that produces an elastic force corresponding to an amount of relative displacement of the wheel-side member 14 and the body-side member 16 in the upward or downward direction may be used as the hydraulic suspension device in accordance with the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
US11/204,105 2004-09-10 2005-08-16 Suspension apparatus Expired - Fee Related US7273209B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004-263537 2004-09-10
JP2004263537A JP2006076469A (ja) 2004-09-10 2004-09-10 サスペンション装置

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US20060054439A1 US20060054439A1 (en) 2006-03-16
US7273209B2 true US7273209B2 (en) 2007-09-25

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US11/204,105 Expired - Fee Related US7273209B2 (en) 2004-09-10 2005-08-16 Suspension apparatus

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US (1) US7273209B2 (de)
EP (1) EP1634734B1 (de)
JP (1) JP2006076469A (de)
CN (1) CN100486823C (de)
DE (1) DE602005007816D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9670979B1 (en) * 2016-05-13 2017-06-06 Liquidspring Technologies, Inc. Resilient expandable pressure vessel

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MA45487A (fr) * 2016-03-15 2019-01-23 Quadro Vehicles S A Suspension améliorée
DE102016003153A1 (de) * 2016-03-15 2017-09-21 Hydac Technology Gmbh Speichervorrichtung und hydropneumatische Federung
US11585052B2 (en) * 2020-03-30 2023-02-21 Caterpillar Paving Products Inc. Milling machine having a hydraulic dampening system
EP4330062A1 (de) 2021-04-26 2024-03-06 Ree Automotive Ltd Zweiachsige fahrzeugeckanordnung
EP4387855A1 (de) 2021-08-16 2024-06-26 Ree Automotive Ltd Zweiradecksystem mit querfederung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527452A (en) 1966-10-08 1970-09-08 Rheinstahl Henschel Ag Connecting device for a hydropneumatic spring member having an additional gas bubble
US4478431A (en) * 1980-11-25 1984-10-23 Bayerische Motoren Werke Aktiengesellschaft Suspension system for vehicles
JPS60193708A (ja) 1984-03-15 1985-10-02 Mazda Motor Corp ハイドロニユ−マチツクサスペンシヨン
JPS6121814A (ja) 1984-07-09 1986-01-30 Kayaba Ind Co Ltd ガスバネの圧力調整装置
JPS6349512A (ja) 1986-08-19 1988-03-02 Tokico Ltd 油圧サスペンシヨン装置
JPS6378806A (ja) 1986-09-19 1988-04-08 Tokico Ltd サスペンシヨン装置
JPS63130419A (ja) 1986-11-20 1988-06-02 Tokico Ltd 油圧サスペンシヨン装置
US5364081A (en) * 1991-01-31 1994-11-15 Mercedes-Benz Ag Motor vehicle suspension system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527452A (en) 1966-10-08 1970-09-08 Rheinstahl Henschel Ag Connecting device for a hydropneumatic spring member having an additional gas bubble
US4478431A (en) * 1980-11-25 1984-10-23 Bayerische Motoren Werke Aktiengesellschaft Suspension system for vehicles
JPS60193708A (ja) 1984-03-15 1985-10-02 Mazda Motor Corp ハイドロニユ−マチツクサスペンシヨン
JPS6121814A (ja) 1984-07-09 1986-01-30 Kayaba Ind Co Ltd ガスバネの圧力調整装置
JPS6349512A (ja) 1986-08-19 1988-03-02 Tokico Ltd 油圧サスペンシヨン装置
JPS6378806A (ja) 1986-09-19 1988-04-08 Tokico Ltd サスペンシヨン装置
JPS63130419A (ja) 1986-11-20 1988-06-02 Tokico Ltd 油圧サスペンシヨン装置
US5364081A (en) * 1991-01-31 1994-11-15 Mercedes-Benz Ag Motor vehicle suspension system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9670979B1 (en) * 2016-05-13 2017-06-06 Liquidspring Technologies, Inc. Resilient expandable pressure vessel
US10047815B2 (en) 2016-05-13 2018-08-14 Liquidspring Technologies, Inc. Resilient expandable pressure vessel

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EP1634734A1 (de) 2006-03-15
JP2006076469A (ja) 2006-03-23
CN1746041A (zh) 2006-03-15
CN100486823C (zh) 2009-05-13
US20060054439A1 (en) 2006-03-16
DE602005007816D1 (de) 2008-08-14
EP1634734B1 (de) 2008-07-02

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